(2.5×4/5)÷(1/4×0.8)-0.75÷3/40=?

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(2.5×4/5)÷(1/4×0.8)-0.75÷3/40=?

(2.5×4/5)÷(1/4×0.8)-0.75÷3/40
=(5/2×4/5)÷(1/4×8/10)-3/4×40/3
=2÷2/10-10
=2×10/2-10
=10-10
=0